The most common water pump problems and failures include bearing seizure , which is subjected to high rotational speeds, and components that directly interact with the pump, such as the pulley and fan, which are not always properly balanced. An overly tight belt , a worn belt, a loose V-belt, a V-belt installed at the wrong angle , poor lubrication , or a lack of lubrication are other causes of water pump damage. The first signs of water pump damage or malfunction include an unusual noise from under the hood, a coolant stain under the tractor, or temperature fluctuations visible on the instrument panel gauges.
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